diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index fd68703..1c21a93 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.20.0"
+  ".": "4.20.1"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f31185d..9b4d23b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## [4.20.1](https://github.com/runwayml/sdk-node/compare/v4.20.0...v4.20.1) (2026-09-23)
+
+
+### Features
+
+* add GPT Image 2.5 Flare and Sunburst, including background, quality, output count, and tagged reference-image options
+* add frame-rate enhancement with selectable target frame rates
+
+### Improvements
+
+* expose workflow node failure codes and document how to detect partial workflow runs
+* represent unlimited organization model limits as `null`
+* include AWS Marketplace subscription-linking events and additional audit-log metadata
+* clarify HDR alpha-channel and ACEScg delivery behavior
+
 ## [4.20.0](https://github.com/runwayml/sdk-node/compare/v4.19.1...v4.20.0) (2026-09-03)
 
 
diff --git a/package.json b/package.json
index 3cc1ace..2b4b227 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@runwayml/sdk",
-  "version": "4.20.0",
+  "version": "4.20.1",
   "description": "The official TypeScript library for the RunwayML API",
   "author": "RunwayML <dev-feedback@runwayml.com>",
   "types": "dist/index.d.ts",
diff --git a/src/version.ts b/src/version.ts
index 2963d88..fb0af90 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '4.20.0'; // x-release-please-version
+export const VERSION = '4.20.1'; // x-release-please-version